Combined filter and check valve



Sept. 19, 1933. R G, DENK 1,927,582

COMBINED FILTER AND CHECK VALV I'I Filed Jan. 21, 1931 EQLPH 6 Dawn Patented Sept; 19,1933 i I J I I 1,927,5s2

COMBINED FILTER A D CHECK VALVE Ralplii"G. -Denk, Peru, Ind.j I Application January 21, 1931. Serial No."51 0,215 r; l v 3 Claims. (01. 210-166) This invention relates to a combined filter and .erably in'the nature of a mesh wire screen ring, 1 check valve of that class adapted to be used priwhich extends from the partition 4 to engage-. marily in connection with hot water heating ment with a plug 11 screwed into the end of plants, although it will be understood that it the body 1, said plug preferably having a plu- Y Y 4 5 may be used for any'purpose desired and one rality of prongs 12 extending inwardly. there- 60 feature of the invention is the provision of a from, overwhich the filter is introduced and filtering medium in connection with the valve by means of which the filter is held in fixed posistructure for removing foreign particles from the tion within the body- 1. As the filtering member fluids passing through the valve. 10 extends from the partition 4 to the end of. 10 A further feature of the invention is the pmthe plug 11 and entirely encircles the'opening 5, 65 vision of means for removably retaining the filany foreign particles contained in the medium tering medium within the valve structure. passing through the valve structure will be sepa- A further feature of the invention is the prorated therefrom and retained by the filter until 2: vision of a buoyant or floating valvefor prevent- Such time the p 11 and filter 10 are 7 a ing the passage of the fluid through the valv moved from the bodyl and the filtering medium'70 structure in one direction. then cleansed thereof. A further feature of the invention is the pro- By providing the resilient seat 6 for the valve vision of a resilient seat for the valve proper. 8 and a more or less buoyant Valve, it will not A further feature of the invention is the prorequirea spring to keep the valve seated, as is p vision of means for removably retaining the filter usual, the weight and pressure of the liquid in and valve proper within thecasing of'the valve the pipe line serving to positively seat thevalve structure. v and depress the upper. inner edge of the seatfi,

Other objects and advantages will be hereinthus forming an extended contact surfacebeI- after more fully set forth and pointed out in .the tween the V /1V and its seat and'formi a D r-'5 accompanying specification. fect seal.

In the accompanying drawing which is made a What I claim is: part of this application, 1. A'combined filter and check valve having Figure 1 is a side elevation of a valve strucchamber walls, an inlet, an outlet, a partition I; ture attached to a pipe line. between said inlet and outlet, a bore extending 30 Figure 2 is a central vertical sectional view through Sai Chamber Walls and Saidpartition.

thereof. a valve element which normally rests on one Figure 3 is a horizontal sectional view as seen side of said partition over the bore thereof, a alongline 3.3, Fig. 2, and, band shaped screen, one edge of which is dis 1 Figure 4 is a similar view as seen along line posed against the other side of said partition 35 4-4, Fig. 2. v concentric with the bore thereof, a plug disposed Referring to the drawing, the numeral 1 desthrough the said chamber walls against the other, 1 ignates the body or casing of the valve strucedge of said screen, serving tohold the other, ture, having an inlet opening 2 and an outlet edge of same against said partition, said plug opening 3, said inlet and outlet being separated having spaced prongs extending within said by means of a partition 4. screen serving to locate sameagainst other con- The partition 4 is provided with a valve opentact of said screen except atits edges," said plug ing 5, the upper end of which is surrounded by serving to permit the removal and replacement 7 a resilient valve seating member 6, the upper of said screen; whereby a liquid entering said 3 face of the partition, around the opening 5, havcheck valve will be distributed through all parts ing a recess 7 for the reception of the seat form- 'of said screen except the limited spacecontacted 4 ing member 6. Adapted to co-operate with'the by said prongs. v seat forming member 6 is a more or less buoyant 2. A combined filter and check valve havin valve 8, preferably inthe nature of a marble, the chamber Walls. a inlet, an Outlet in line With upper end of the body 1 having a cap 9 threaded said inlet, a flat partition between said outlet 6 thereinto for retaining the valve 8 within the and inlet, a bore extending through said partiupper portion of the body, and by means of tion transverse toa line. passing through said which the valve may be entered into or removed inlet and Outlet, a valve element which norfrom the body 1. mally rests on one side of said partition over On the opposite side of the partition 4 from the'bore thereof, a band shaped screen member, I the valve seat 6, is a filtering member 10, pref- One edgehf which s disposedhgainst' the other Y E T ATE AT NT emcee "side'of said partition at the bore thereof, concentric therewith, said screen member being free of continuous contact except at its edges, a plug disposed through the said chamber walls against the opposite edge of said member, said plug having a substantiallyflat face serving to hold the other edge of same against said partition and serving to permit the removal and replacement I i of, same; whereby substantially all of said screen terminating in a counter bore shaped recessat' one end, a washershaped resilient'm ember disposed within said resilient member having a hole concentric with said bore at one end, a valve element which normally rests on said resilient member on one side of said partition over the hole thereof, a'band shaped screen, one edge of which'is disposed directly again'st-theother side of said partition, concentric with hole of a d e l n m m a plug disposed throu h e-s d hamb r l; sa d s: having a flat face disposed against the other end of 'said screen,

servingto-hold the other edge of same against said partition and serving to permit the removal and replacement of said screen; whereby aliqtu'd' entering said check valve will pass directly from said inlet through said screen and partitionancl directlyinto said outlet.

RALPH G. DENK. 

